<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <link rel="stylesheet" href="./css/inputnumber.css" />
  <link rel="stylesheet" href="./css/index.css" />
  <title>购物车</title>
</head>

<body>
  <div class="app-container" id="app">
    <!-- 顶部banner -->
    <div class="banner-box"><img src="http://autumnfish.cn/static/fruit.jpg" alt="" /></div>
    <!-- 面包屑 -->
    <div class="breadcrumb">
      <span>🏠</span>
      /
      <span>购物车</span>
    </div>
    <!-- 购物车主体 -->
    <div class="main">
      <div class="table">
        <!-- 头部 -->
        <div class="thead">
          <div class="tr">
            <div class="th">选中</div>
            <div class="th th-pic">图片</div>
            <div class="th">单价</div>
            <div class="th num-th">个数</div>
            <div class="th">小计</div>
            <div class="th">操作</div>
          </div>
        </div>
        <!-- 身体 -->
        <div class="tbody">

          <!-- 渲染需要的行 -->
          <!-- 
            <div class="tr">
            <div class="td"><input type="checkbox" checked /></div>
            <div class="td"><img src="http://autumnfish.cn/static/火龙果.png" alt="" /></div>
            <div class="td">6</div>
            <div class="td">
              <div class="my-input-number">
                <button class="decrease"> - </button>
                <span class="my-input__inner">2</span>
                <button class="increase"> + </button>
              </div>
            </div>
            <div class="td">12</div>
            <div class="td"><button class="del">删除</button></div>
          </div> 
        -->

        </div>
      </div>
      <!-- 底部 -->
      <div class="bottom">
        <!-- 全选 -->
        <label class="check-all">
          <input type="checkbox" />
          全选
        </label>
        <div class="right-box">
          <!-- 所有商品总价 -->
          <span class="price-box">总价&nbsp;&nbsp;:&nbsp;&nbsp;¥&nbsp;<span class="price">24</span></span>
          <!-- 结算按钮 -->
          <button class="pay">结算( 6 )</button>
        </div>
      </div>
    </div>
    <!-- 空车 -->
    <div class="empty">🛒空空如也</div>
  </div>
  <script>
    const dataArr = [
      {
        id: 1,
        icon: 'http://autumnfish.cn/static/火龙果.png',
        isChecked: true,
        num: 2,
        price: 6,
      },
      {
        id: 2,
        icon: 'http://autumnfish.cn/static/荔枝.png',
        isChecked: false,
        num: 7,
        price: 20,
      },
      {
        id: 3,
        icon: 'http://autumnfish.cn/static/榴莲.png',
        isChecked: false,
        num: 3,
        price: 40,
      },
      {
        id: 4,
        icon: 'http://autumnfish.cn/static/鸭梨.png',
        isChecked: true,
        num: 10,
        price: 3,
      },
      {
        id: 5,
        icon: 'http://autumnfish.cn/static/樱桃.png',
        isChecked: false,
        num: 20,
        price: 34,
      },
    ]

    //渲染
    const checkall = document.querySelector('.check-all input')
    const check = document.querySelectorAll('.tr div:nth-child(1) input')
    const checked = Array.from(check)
    const tbody = document.querySelector('.tbody')
    function render() {
      tbody.innerHTML = dataArr.map(
        (e, index) => {
          const { icon, isChecked, num, price } = e
          return `
          <div class="tr" data-id="${index}">
            <div class="td"><input type="checkbox" ${isChecked ? 'checked ' : ''} /></div>
            <div class="td"><img src=${icon} alt="" /></div>
            <div class="td">${price}</div>
            <div class="td">
              <div class="my-input-number">
                <button class="decrease"> - </button>
                <span class="my-input">${num}</span>
                <button class="increase"> + </button>
              </div>
            </div>
            <div class="td">${num * price}</div>
            <div class="td"><button class="del">删除</button></div>
          </div> 
          
          `
        }

      ).join('')

      checkall.checked = dataArr.every(e => e.isChecked === true)

      //总价
      const newArr = dataArr.filter(e => e.isChecked === true)
      let total = newArr.reduce((prev, item) => prev + item.price * item.num, 0)
      document.querySelector('.price').innerHTML = total.toFixed(2)
    }
    render()


    //复选框

    // console.log(checked);
    checkall.addEventListener('click', () => {
      dataArr.forEach(e => e.isChecked = checkall.checked)
      render()
    })

    //小框反选
    const myinput = document.querySelector('.my-input')
    tbody.addEventListener('click', function (e) {
      const id = e.target.parentNode.parentNode.dataset.id

      if (e.target.tagName === 'INPUT') {
        console.log(e.target.checked) // 必须让数组的
        dataArr[id].isChecked = e.target.checked
        render()
      }

      //减
      if (e.target.className === 'decrease') {
        const idNum = e.target.parentNode.parentNode.parentNode.dataset.id

        if (dataArr[idNum].num <= 1) {
          return
        }
        dataArr[idNum].num--
        render()
      }

      //加
      if (e.target.className === 'increase') {
        const idNum = e.target.parentNode.parentNode.parentNode.dataset.id
        console.log(e.target.parentNode.parentNode.parentNode)
        dataArr[idNum].num++
        render()
      }
      //删
      if (e.target.className === 'del') {
        dataArr.splice(id, 1)
        render()
      }
    })


     //总价


  </script>
</body>

</html>